Magnetic Analysis Corporation, a designer and manufacturer of nondestructive test systems for over 80 years, recently supplied a multi-test eddy current/ultrasonic system to inspect small diameter titanium bars and rods (2.54 mm to 31.75 mm). Testing criteria was AMS-2631B, Class AA for the ultrasonic test (Aerospace specifications) and typical eddy current inspection standards for the eddy current test.

 

By combining eddy current and ultrasonic technology in a comprehensive inspection system, superior test results can be obtained as each technique is used to detect the conditions that it is best suited to find. This particular system incorporates Echomac® FD-4 ultrasonic instrumentation, an Echomac Rotary which spins the transducers and water couplant around the bar, and a MultiMac eddy current instrument and test coil. The UT test uses 1 normal incidence and 2 shear wave transducers to inspect for surface and near-surface defects such as seams, spiral seams and light cracks as well as inclusions and deep voids. The eddy current single channel test compliments the UT test by detecting some very small surface seams or pitting that are poor reflectors of sound. The test system also includes  air operated dual pinch stands designed to drive and position the test material accurately, a slide and elevate platform to adjust the UT Rotary, a water recirculation system for the couplant, and automatic markers. The system is mounted on a welded test bench and “learn controls” are included to automatically adjust the timing based on the initial test piece.

 

With manufacturing facilities in Mt. Vernon, New York, US, and Ostersund, Sweden, MAC designs, manufactures and installs test systems in bar and tube mills worldwide. Experienced sales engineers and representatives help customers to get the best possible inspection system for their particular application. In addition to the titanium test system described above, MAC has delivered large combined ultrasonic/ flux leakage systems to inspect 180 and 220 mm oil country tubular goods in Russia and India.